How many hearts does an octopus have?
An octopus has three hearts: two pump blood through the gills and one pumps it to the rest of the body.
- Home
- What is the crown-of-thorns starfish?
“The crown-of-thorns starfish eats coral and can damage reefs.”
Reference: Australian Institute of Marine Science
More from this shelf
Are starfish fish?
Starfish aren't fish, so scientists prefer to call them sea stars.
What are coral reefs?
Coral reefs are colonies of micro creatures named pollups, little hair-like things that live on the top layer of the coral. The coral grows because when one generation dies they leave behind a hard, stony, branching structure made of limestone which later generations call home.